The process by which air is circulated through or mixed with a substance such as soil or a liquid.
By extension, a process in which other gases (such as carbon dioxide or nitrogen or argon) are circulated through or mixed with a substance (usually liquid), sometimes with the consequence of increasing the transfer of air into the same liquid at the surface due to the induced circulation.
foam
Thousands of African children die each day: why do the newspapers continue to discuss unnecessary showbiz froth?
Highly speculative investment.
The idle rich;
unimportant or insubstantial talk, events, or actions; drivel
To spit, vent, or eject, as froth.
To cover with froth.
(of a liquid) To bubble.
To create froth in (a liquid).
(literally) To spew saliva as froth; (figuratively) to rage, vent one's anger.